LED RETROFIT LAMP

摘要

The present invention relates to an LED retrofit lamp (700) adapted for operation with an alternating current. The LED lamp comprises an LED unit (740), a mains current line, first and second switching devices (710, 720) (e.g., first and second relays), and a control unit (730). The control unit (730) detects an ignition voltage on the mains current line. In response to detecting the ignition voltage on the mains current line, the control unit (730) sets the first and second switching devices (710, 720) to a conducting state such that the LED unit (740) is connected to power. By using the first and second switching devices (710, 720), safety of the LED lamp (700) is improved, in particular when installing the lamp (700) into a fixture designed for fluorescent lamps.

主权项

1. An LED retrofit lamp adapted for operation with an alternating current, comprising
an LED unit, a mains current line; a first switching device and a second switching device, said first switching device, said second switching device, and said LED unit being connected in series along said mains current line; and a control unit adapted to detect an ignition voltage on said mains current line; in response to detecting said ignition voltage on said mains current line, set said first and second switching devices at least temporarily to a conducting state, wherein the control unit comprises at least one capacitor coupled in parallel to the first and second switching devices, said at least one capacitor being adapted, during a startup mode of operation, to detect said ignition voltage on said mains current line.